The U.K.'s largest Port Authority has specified a Caterpillar 3056 marine engine to provide propulsion power onboard a new 32-ft. (9.7-m) salvage cutter. The Port of London Authority ordered the new vessel to replace an aging cutter, which has been part of a team of three boats providing support for the authority's two salvage ships Hookness and Crossness since the early 1970s. Being built by Wickham Marine of Colchester using an innovative jig system, which creates a mold in which the steel-hull vessel is built, the boat is open-decked and similar in design to its predecessor. The build method means that the vessel is built from the outside in, i.e. the hull structure is built first, before equipment and systems are installed.